/* 默认样式大小 兜底保证 */
html {
  font-size: 50px;
}
@media screen and (min-width: 320px) {
  html {
    font-size: 21.33333333px;
  }
  body {
    font-size: 1pox;
  }
}
@media screen and (min-width: 360px) {
  html {
    font-size: 24px;
  }
}
@media screen and (min-width: 375px) {
  html {
    font-size: 25px;
  }
}
@media screen and (min-width: 400px) {
  html {
    font-size: 26.66666667px;
  }
}
@media screen and (min-width: 414px) {
  html {
    font-size: 28.26666667px;
  }
}
@media screen and (min-width: 480px) {
  html {
    font-size: 32px;
  }
}
@media screen and (min-width: 540px) {
  html {
    font-size: 36px;
  }
}
@media screen and (min-width: 720px) {
  html {
    font-size: 48px;
  }
}
@media screen and (min-width: 750px) {
  html {
    font-size: 50px;
  }
}
img {
  vertical-align: middle;
}
a {
  text-decoration: none;
}
body {
  min-width: 320px;
  max-width: 750px;
  width: 15;
  margin: 0 auto;
  line-height: 1.5;
}
.header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 15rem;
  height: 1.8rem;
  background-color: #ffc001;
}
.classify {
  width: 0.84rem;
  height: 1.4rem;
  margin-left: 0.2rem;
}
.classify img {
  width: 100%;
  height: 100%;
}
.search {
  flex: 1;
  height: 1.34rem;
  margin: 0 0.4rem;
  background-color: #fff2cc;
  outline: none;
  border: 0;
  border-radius: 0.7rem;
  padding: 0 0.5rem;
  font-size: 0.5rem;
  color: #757575;
}
.login {
  width: 1.4rem;
  height: 1.2rem;
  line-height: 1.2rem;
  text-align: center;
  font-size: 0.5rem;
  color: white;
}
.banner {
  width: 15rem;
  height: 7.36rem;
}
.banner img {
  width: 100%;
  height: 100%;
}
.add {
  width: 15rem;
  display: flex;
}
.add a {
  flex: 1;
}
.add a img {
  width: 100%;
}
.nav {
  width: 15rem;
}
.nav a {
  position: relative;
  float: left;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
  width: 3rem;
  height: 3.3rem;
  font-size: 0.5rem;
  color: #222;
}
.nav a img {
  width: 1.8rem;
  height: 1.8rem;
}
